Gecko Sensors
Gecko Sensors, Hi-Limits and Pressure Switches
Temperature and hi-limit sensors and pressure switches for Gecko MSPA, TSPA, Y-series and in.yj systems.
Shop Gecko Parts: Spa Packs | Topside Controls | Wi-Fi (in.touch) | WaterLab | in.clear Salt System | Heaters | Jet Pumps | Circulation Pumps | Wet Ends & Impellers | Cords & in.link Plugs | Sensors & Switches
Popular Sensors & Switches: Sensor 9920-400245 | Sensor 9920-401397 | Hi Limit Sensor 34-0203Y-36-K
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Gecko Hot Tub Parts
Gecko Sensor – Temp, MSPA, TSPA, 25′, 3/8″ Diameter, 4-pin – 9920-400245
$128.99 Add to cart
Common Gecko Sensors & Switches Parts
- Temperature sensors
- Hi-limit sensors
- Pressure switches
How to Identify the Correct Part
Before ordering, find the Gecko part number on the label, your spa pack model and your spa’s make and serial number. Photos of the old part help us confirm it.
✅ Not Sure It Fits? Verify Before Ordering
Gecko parts are matched by part number, spa pack model and connector. Send clear photos of:
- The label on the part you are replacing
- Your Gecko spa pack label (in.yj, in.ye, in.yt, in.xe…)
- Your spa serial number sticker
EZ Hot Tub Parts confirms fitment before you order, so you do not pay return freight on a wrong part.
Gecko Sensors & Switches Frequently Asked Questions
A failing sensor can look like a heater problem. Error codes from your topside help us tell the difference.